A synthesis of tortuosity and dispersion in effective thermal conductivity of porous media

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成果类型：

期刊论文

作者：

Yang, C.;Nakayama, A.*

通讯作者：

Nakayama, A.

作者机构：

[Nakayama, A.; Yang, C.] Shizuoka Univ, Dept Mech Engn, Hamamatsu, Shizuoka 4328561, Japan.

[Yang, C.] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Hubei, Peoples R China.

[Nakayama, A.] Wuhan Polytech Univ, Dept Civil Engn, Wuhan 430023, Hubei, Peoples R China.

[Nakayama, A.] Shizuoka Univ, Dept Mech Engn, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328561, Japan.

通讯机构：

[Nakayama, A.] S

Shizuoka Univ, Dept Mech Engn, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328561, Japan.

语种：

英文

关键词：

Effective thermal conductivity;Porous media;Tortuosity;Dispersion

期刊：

International Journal of Heat and Mass Transfer

ISSN：

0017-9310

年：

2010

卷：

期：

15-16

页码：

3222-3230

DOI：

10.1016/j.ijheatmasstransfer.2010.03.004

基金类别：

National Key Basic Research Development Program of ChinaNational Basic Research Program of China [2007CB 206903]

机构署名：

本校为其他机构

院系归属：

土木工程与建筑学院

摘要：

Effects of tortuosity and dispersion on the effective thermal conductivity of fluid-saturated porous media are investigated analytically with help of a volume averaging theory. Firstly, a general expression for the effective stagnant thermal conductivity has been derived using a unit cell model, which consists of rectangular solids with connecting arms in an in-line arrangement. The validity of the expression for the stagnant thermal conductivity has been confirmed comparing the present results with available experimental and theoretical data for packed beds, porous foams and wire screens. Sec...

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A synthesis of tortuosity and dispersion in effective thermal conductivity of porous media

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